Caster for furniture.



A. B. DISS.

CASTER FOR FURNITURE.

APPLICATION FILED JUNE 29, 1911.

Patented Sept. 2, 1913.

Inventor:

Atty/ UNKTED PATENT ALBERT B. DISS, OF NEl/VARK, NEW JERSEY, ASSIGNOR 'lO UNIVERSAL CASTER & FOUNDRY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

CASTER FOIL FURNITURE.

Specification of Letters Patent.

la'tentetl Sept. 72), l 913.

Application filed June 25), 1911. Serial No. 636,028.

To all who), it may cone 2m l le it known that I, AJJEER'L l). Dlss, a citizen of the United States, and a resident of Newark, New Jersey, (whose post-oflice address .is in care of Universal Caster & Foundry Company, at Newark, New Jersey,) have invented certain new and use'tul improvements in Casters 'lor Iiurniture, of which the following is a description.

The invention relates primarily to means for reducing the friction of rotation upon the vertical pintle. It is equally applicable to the many ditl'erent forms of casters.

The invention will be readily understood by description of the most preferred form of structure now known to me, which is shown in the accompanying drawings and is as follows:

By the term caster, unless the context shows a more specific meaning, I will refer to the whole caster structure, including the stationary and movable parts; and for the purpose of illustration I have selected a form having a plate for attachment to the base of the 't'nrniture and a stationary pintle about which the caster jaws gyrate.

Figure 1 is a side view of caster applied to a wooden base, shown in cross'section. Fig. 2 is a cross-section of attaching plate and pintle. Figs. 2) and t are side view and. end view of one of the rollers. Fig. 5 is a top view of the intermediate piece of the roller housing. Fig. 6 is a cross-section of the same on the section planes 6-6. Fig. 7 is a similar section of a modified housing. Fig. 8 is a top view of such a modified housing.

The plate 11 is provided with an annular corrugation 12 :t'orming a bearing for the six rollers 13. These rollers roll between the bearing 12 and a corresponding bearing surface upon the jaws 1 L Concentric with the bearing 12 is the groove 15 in which run the guide flanges 16 of the rollers 13. A sin'lilar groove in the jaws 14; gives clearance for the flanges 16. Manil'estly, the rollers 13, it accurately designed, are rolling conical sur faces converging to the center 0f the axis of motion, as indicated by the broken lines in Figs. 8 and 4:. The flanges 1(3 keep the rollers in place radially. They are kept from displacement peripherally by an intermediate piece or housing 21, one design of which is shown in Figs. 5 and 6, and which loosely and approximately tits and spaces the several rollers, being cut away to receive the rollers and having an interrupted flange 22. Manilestly, the design of this housing can be varied, and a form which omits the central bearing oi the housing on the pintle is shown in l igs. T and 8 and mnnbercd 21. it will. be seen that in the form shown each 01. the rollers consists of a conical or cylindrical portion which rolls on the annular rails or tracks furnished by the 0pposed bearing surfaces of the plate 11 and jaws 14-, and each of these rollers carries a guide flange 16, which may, and preferably should, make no contact at its periphery, because the peripheral speed 01' the flange will be greater than the law of proper rolling of the conical portions 13 will permit. It will he lu'nlerstoml that it the rollers 13 make only a line contact with their hearing sur- Jt'aces it will be immaterial whether they are conical, cylindrical or spheroidal, like the caster wheel in shape. it will also be seen that thedownturned flange 22, extending in the interval between the jaws 1% and the upper roller-bearing plate 11, whether interruptcd, as in lfligs. 1--(3, or continuous, as in Figs. 7 and 8, terms a protection for preventing dust and :toreign bodies materially inlerl'ering with the action of the rollers.

'Without limiting myselit' otherwise than is implied by the law, .1: claim the following:

11.. In a caster structure, the combination of a caster wheel, jaws, pintle, flanged rollers and an upper roller-bearing plate and a housing having openings for holding and spacing the rollers and also having an exposed flange extending in the interval between said jaws and plate for protecting said rollers, the flanges traveling in annular guideways and the rolling surfaces of the rollers being approximately beveled, at least in part, to term beveled surfaces convergent to the appropriate common center of motion. 2. in a caster striusture, the combination of a caster wheel, jaws, pintle, rollers and upper roller-bearing plate, said plate and jaws having opposed corrugations and concentric grooves, said rollers running on said corrugations and having guide flanges at their inner ends running in said grooves, and a housing having a flange extending between the said plate and jaws and openings which hold and space the rollers.

3. In a caster structure, the combination In testimony whereof I have signed this of a plurality of flanged rollers, and jaws specification in the presence of tWo subscriband supporting plate having annular bearing Witnesses. v ing surfaces which make contact with the p ALBERT B. DISS.

.5 rollers, and a housing Which receives, spaces Witnesses:

and locates the rollers; said housing having K. G. Ln ARD, a peripheral flange 22 Which is downturnecl. FRANo 's A. STANTON.

fiopies of this patent may be obtained for five cents eacinby addressing the Commissioner of Patents. Wa shiiigt(in,I). C. 

